JP2003245567A - Heating and grinding apparatus and method, and heated and ground material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable recycling of coated wastes such as shredder dust of automobiles. <P>SOLUTION: The heating and grinding apparatus 1 comprises an upper grinder 4 having a supply port 3 for supplying an object 2 to be ground, a lower grinder 5 engaged with the upper grinder 4 for grinding, a heater 6 installed in the down face of the lower grinder 5, a driving apparatus 7 provided with reduction gears for rotating the upper grinder 4, a cover 9 for covering the upper grinder 4, the lower grinder 5, and the heater and forming a grinding chamber 8, a supply apparatus 10 for supplying the object 2 to be ground to the supply port 3, a discharge pipe 12 for discharging crushed material 11 between the upper grinder 4 and the lower grinder 5, a water discharge pipe 13 for discharging a liquid from the crushing chamber 8, a vapor discharge pipe 15 for discharging the vapor 14 from the crushing chamber 8 and the apparatus heats and grinds the object 2 to be ground to the crushed material 11 and separates the liquid and vapor generated following the grinding. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating milling device, a heating milling method, and a heated milling product for granulating a material to be milled such as paint waste liquid and automobile dust.

[0002]

2. Description of the Related Art In recent years, regarding the recycling of paints for automobiles, in JP-A-2000-42521, paint wastes are spread on a tray in a drying chamber and placed on a stacking shelves. The paint waste is dried by exposing it to this air.When the paint waste has dried to a certain extent, it is taken out and coarsely crushed, and it is placed in the drying chamber again and exposed to air at low temperature at room temperature for further drying. An invention has been proposed in which the powder is taken out and finely pulverized to obtain a powder having an extremely low water content. In addition, JP-A-6
-470, the lumpy paint waste is put into a sealable treatment tank, the treatment tank is heated from the outside, and the paint waste in the treatment tank is directly sprayed with steam to pulverize and heat the paint waste. Melting, heating and drying this, the paint waste hardened by heating is pulverized into a powder form, the pulverized resin powder is mixed with an additive having a hygroscopic property, and the resin powder is dried at room temperature. Proposed.

Iron and non-ferrous metals are sorted and reused in automobile shredders, but other ones are called shredder dust (crushed residue such as automobiles, abbreviated as ASR), which is 15 to 25 wt% (about 80%). (10,000 tons / year) are landfilled. This shredder dust contains 23 to 30 wt% of incombustibles and 70 to 77 wt% of combustibles,
Non-combustible material is about 15 wt% of unrecovered metal type, about 7 wt% of glass, and combustible material is about 4 of hard and soft plastic and rubber.
It is considered that 0 wt% and urethane foam / fibers are about 30 wt%. The bulk specific gravity is roughly between 0.15 and 0.10. It is very light and fluffy.

Recycling of shredder dust is performed, for example, by
Japanese Unexamined Patent Publication No. 8-112584, an invention in which a metal is removed from waste shredder dust, a grain size is 20 mm or less with a crusher and a sieve, and a resin material is solidified as a binder to obtain a secondary processed body. In 17938, shredder dust was re-ground to a size that passed through a 8 mm sieve, the cement composition was mixed into the finely ground dust after roughly removing metal components, and water was further added and kneaded. Inventions and the like of injecting into and solidifying are proposed.

[Problems to be Solved by the Invention]

However, although the waste liquid generated in the automobile manufacturing process, for example, the coating efficiency of the coating liquid in the automobile coating process is desperately attempted, there is a limit to the atomization coating, and thus electrostatic coating is performed. Even if you adopt
%, When it is high, 50% or more is liquid paint waste. The painting process is desperately required to solve environmental problems. Therefore, although various devices have been proposed, in reality, such paint waste has no choice but to incinerate the paint sludge after removing water. Therefore, fossil fuel is required to heat the paint waste, and it has to be processed through multiple steps, the cost rises, and no practical treatment equipment has yet emerged that can reduce the disposal cost. Is the reality.

Further, since the constituent components of the shredder dust have different physical properties, it is difficult to recycle the shredder dust, and it is strongly desired to recycle the shredder dust.

[0007]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and a heating and grinding apparatus according to claim 1 is an upper mill provided with a supply port for supplying an object to be ground, an upper mill and a grinding mill. A lower mill to be engaged, a heater provided on the lower surface of the lower mill, a drive device for rotating the lower mill or the upper mill, and a cover for covering the upper mill, the lower mill and the heater to form a grinding chamber. A supply device for supplying the material to be ground to the supply port, a discharge portion for discharging the ground material discharged between the upper mill and the lower mill, and a liquid discharging portion for discharging the liquid in the grinding chamber, A gas discharge part for discharging gas in the grinding chamber, the object to be ground is heated and ground, the object to be ground is pulverized, and the liquid and the gas generated thereby are separated. A heating milling device is preferred. An automobile paint waste liquid, comprising:
Efficient treatment of shredder dust etc. becomes possible and waste can be reused or recycled.

According to the second aspect of the present invention, the object to be ground is supplied to the supply port of the upper mill and the lower mill or upper mill is rotated to bring the upper mill and lower mill into milling engagement. The ground material discharged between the mortar and the lower mill is discharged, the liquid in the grinding chamber is discharged, the gas in the grinding chamber is discharged, the ground object is heated and ground, and the ground material is ground. A heating and grinding method characterized by granulating and separating a liquid and a gas generated thereby is preferable. The same object as in claim 1 can be achieved by the heating and grinding method of claim 2.

A third aspect of the present invention is preferably a heat-milled product obtained by granulating the paint waste liquid by the heat-milling device of the first aspect or the heat-milling method of the second aspect. For example, the water content weight ratio of the paint waste liquid is 50 to 80%, preferably 50 to 80%.
If it is 60%, it can be made into 20% or less, preferably 5% or less, particularly preferably 1% or less in one step. As a result, effective recycling of energy can be realized because thousands of tons of paint wastes from automobiles are generated every month. There are various potential uses as fuel and the like.

A fourth aspect of the present invention is preferably a heat-milled product in which shredder dust is powdered by the heat-milling device of the first aspect or the heat-milling method of the second aspect. As a result, it is possible to reduce the amount of shredder dust to be landfilled and to recycle approximately 800,000 tons of shredder dust per year.

BEST MODE FOR CARRYING OUT THE INVENTION A heating and grinding device 1 according to a first embodiment of the present invention will be described below with reference to FIGS. The milling device 1 includes an upper mill 4 having a supply port 3 for supplying an object to be milled 2, a lower mill 5 for milling engagement with the upper mill 4, and a lower mill 5.
The heater 6 provided on the lower surface of the upper mill 4, the drive unit 7 with a reduction gear that rotates the upper mill 4, the cover 9 that covers the upper mill 4, the lower mill 5, and the heater 6 to form the grinding chamber 8, and the supply port 3. A supply device 10 for supplying the material to be ground 2, a discharge pipe 12 for discharging the ground material 11 discharged from between the upper mill 4 and the lower mill 5, and a water discharge pipe 13 for discharging the liquid in the grinding chamber 8. And steam 1 in the grinding chamber 8
And a steam discharge pipe 15 for discharging 4 to heat the ground material 2 to be ground to form the ground material 2 into powdered ground material 11 and separate the liquid and steam 14 generated thereby. It is characterized by doing.

The object to be ground 2 is a waste liquid of paint. Object to be ground 2
Is a penetrating hole eccentric from the center of the upper mill 4. A bearing hole 40 is provided in the upper mill 4. A through hole 50 is formed at the center of the lower mill 5.

The material of the upper mill 4 and the lower mill 5 is ceramic,
Stone, iron (preferably baked), and the like. The upper mortar 4 and the lower mortar 5 are circular plates, and grooves 41 and 51 are formed on their respective grinding engagement surfaces. The shapes or structures of the upper mill 4 and the lower mill 5 are selected from appropriate types depending on the type of the object to be ground 2. A receiving tray 52 for receiving the powdery ground material 11 discharged from between the upper mill 4 and the lower mill 5 is provided around the tray 52. A discharge port 53 is formed in the tray 52. The clearance between the upper mill 4 and the lower mill 5 has a structure that can be manually adjusted by a screw or the like.

The heater 6 is an electric heater (other heat sources include steam, gas (hot air), halogen lamps, etc.), is installed on the lower surface of the lower mill 5, and has the same shape as the lower mill 5. The lower mill 5 is heated, and the material to be ground 2 is heated and ground to evaporate the water content and dry it. The lower mill 5 and the heater 6 are fixed to the upper surface of the base housing 70.

The drive unit 7 is a motor with a speed reducer and is covered by a base housing 70. Drive device 7
Is for rotating the upper mill 4. Rotating shaft 7 of drive device 7
1 is extended vertically upward. The rotating shaft 71 is the heater 6
And penetrates through the central portion of the lower mill 5. The upper end of the rotary shaft 71 is fitted in the bearing hole 40 and fixed by a fixture (bolts, nuts, etc.) not shown. Upper mill 4 and rotating shaft 71
And rotate together.

The grinding chamber 8 holds the steam 14 generated during the heating grinding. The cover 9 preferably comprises a heat insulating material. The lower end of the cover 9 is fixed to the base housing 70. This is to collect steam and keep it warm.

The supply device 10 preferably has a structure in which a flexible tube 32 that is movable relative to the hopper 31 is connected. This is because the upper mill 4 rotates and the supply port 3 makes a circular motion. The lower end of the flexible tube 32 is inside the supply port 3.

The ground material 11 is in powder form. It is preferably dried to the extent that it can be used as fuel or the like. The discharge pipe 12 is a passage for discharging the ground product 11 discharged from the discharge port 53 to the outside. The water discharge pipe 13 discharges water droplets formed by the vapor 14 in the grinding chamber 8 being condensed. The steam 14 is generated from the ground material 11. The steam discharge pipe 15 is for removing the steam 14.
This is to prevent the vapor pressure from rising.

The operation of the grinding device 1 will be described. Grinding device 1
Turn on and turn on the power. The heater 6 is heated,
The drive device 7 drives. The upper mill 4 is rotated by the driving device 7. Supply device 1 for automobile paint waste liquid that is the object to be ground 2
Input from 0. Automotive paint effluent is waste paint produced in the automotive painting process. The object to be ground 2 is supplied from the supply device 10 through the supply port 3 to between the upper mill 4 and the lower mill 5.
The object to be ground 2 is heated and ground by the upper mill 4 and the lower mill 5. The ground grind 11 is discharged from the gap between the upper mill 4 and the lower mill 5 through the receiving tray 52 to the discharge pipe 12 through the discharge port 53.
Due to the heating of the heater 6, the water content of the object to be ground 2 is evaporated and discharged into the grinding chamber 8 through the gap between the upper mill 4 and the lower mill 5. The steam 14 in the grinding chamber 8 is condensed in the grinding chamber 8 and stored as water on the upper surface of the base housing 70, and is discharged from the water discharge pipe 13. The steam 14 is discharged to the outside from the steam discharge pipe 15. Thus, about 50-80% of the water content of the object to be ground 2
Evaporates, and the water content weight ratio is 5% or less, preferably 1
% Or less of powdered ground material 11 can be produced. It is an advantage that the material to be ground 2 which is a clay-based paint waste liquid can be dried and powdered with almost no mechanical resistance in one step.

A grinding device 201 according to a second embodiment of the present invention will be described with reference to FIG. This embodiment is the first
The description of the elements common to the embodiment is cited with the numbers in the 200s. In the milling device 201, the upper mill 204 is fixed to the cover 209 via the fixing structure 291, the rotary shaft 271 is loosely fitted to the upper mill 204, the heater 206 is fixed to the base housing 270, and only the lower mill 205 is fixed. It is rotatable. The lower mill 205 is fixed to the rotary shaft 271 with a fixture (not shown). The operation is almost the same as in the first embodiment.

A third embodiment of the present invention will be described.
In the third embodiment, different kinds of grinding objects, for example, (1)
Waste cardboard and resin, (2) waste fiber (fiber waste, etc.) and resin,
(3) Waste cardboard, fiber waste and resin, (4) Waste ropes (rope waste, etc.) and resin, (5) Waste ropes (rope waste, etc.) and waste fiber (fiber waste, etc.), resin, (6) Waste ropes (rope scraps, etc.), waste corrugated cardboard, resin, and other dissimilar materials are kneaded by heating and grinding. The resin may be a genuine product or a waste resin. In addition, the main purpose is to evaporate water such as sludge and feces.

The embodiment of the present invention has been described above.
It goes without saying that the structure of the present invention can be appropriately modified without departing from the scope of the present invention. Such modifications and the like have the same technical idea, and are therefore included in the present invention. For example, although the upper mill or the lower mill is rotated in the embodiment, the structure may be such that both mills are rotated.

[0022]

As described above, according to the present invention, by utilizing the characteristics of the mortar and applying the heating power to the mortar while applying the rotational power to the mortar to heat the mortar, the material to be ground is crushed in one step. Milling and drying can be performed. Therefore, the process of treating the ground material can be simplified and the cost can be reduced. Since the waste paint can be made into powder, the manufactured powder can be used for various purposes such as fuel. Further, a molding material can be made by mixing a resin or the like into the object to be ground. This molding material can be variously molded by a molding machine.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view of a grinding device according to a first embodiment of the present invention.

2A is a plan view of the upper mill, FIG. 2B is a bottom view of the upper mill, FIG. 2C is a plan view of the lower mill, and FIG. 2D is a bottom view of the lower mill.

FIG. 3 is a central longitudinal sectional view of a grinding device according to a second embodiment of the present invention.

[Explanation of symbols]

1 ... Milling device 2 ... Grinding object 3 ... Supply port 4 ... Upper mill 5 ... Lower mill 6 ... Heater 7 ...
-Drive device 8 ... Grinding chamber 9 ... Cover 10 ... Supply device 11 ... Grinded material 12 ... Discharge pipe 13 ... Water discharge pipe 14 ... Steam 15 ... Steam Discharge pipe 40 ... Bearing hole 50 ... Through hole 41, 51 ... Groove 52 ... Receiving tray 53 ... Discharge port 70 ... Base housing 71 ... Rotating shaft 31 ... Hopper 32 ... Flexible tube

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Claims (4)

[Claims] 1. An upper mill having a supply port for supplying an object to be ground, a lower mill millingly engaged with the upper mill, a heater provided on a lower surface of the lower mill, and the lower mill or the upper mill. A rotating drive device, a cover that covers the upper mill, the lower mill and the heater to form a grinding chamber, a supply device that supplies the object to be ground to the supply port, and a discharge from between the upper mill and the lower mill. And a gas discharge unit for discharging the gas in the grinding chamber, and a heating and grinding unit for grinding the object to be ground. A heating and grinding device characterized by pulverizing an object to be ground and separating a liquid and a gas generated thereby. 2. An object to be ground is supplied to a supply port of an upper mill, and the lower mill or the upper mill is rotated so that the upper mill and the lower mill are ground and engaged, and discharged from between the upper mill and the lower mill. The ground material to be ground is discharged, the liquid in the grinding chamber is discharged, the gas in the grinding chamber is discharged, the material to be ground is ground by heating, and the material to be ground is granulated. A method of heating and triturating, characterized in that the resulting liquid and gas are separated. 3. The heating and grinding device according to claim 1 or claim 2.
A heat-milled product in which the waste liquid of a coating material is granulated by the heat-milling method described. 4. A heating and grinding device according to claim 1, or claim 2.
A heat-milled product in which shredder dust is powdered by the heat-milling method described.